Question new RenderMeshArray: Mesh[] and Material[] are null

Dear Unity Forum,
I am trying to spawn new Entities and attach a RenderMeshArray component to them for procedural terrain during RunTime. For some reason the Meshes- and the Material-Array are always NULL when I check the newly created Entity in the Inspector, thus nothing is being rendered.
When I use the RenderMeshArray component from an Entity that was converted in a SubScene, I can at least exchange the Meshes and Materials in the existing array. But as soon as I create a new array and assign it to the component and add the component to the entity it is also null.

Code (CSharp):

1.  
2. Entity tileEnt = EM.CreateEntity(typeof(LocalToWorld), typeof(RenderMeshArray), typeof(RenderBounds));
3. EM.AddComponentData<LocalTransform>(tileEnt, new LocalTransform { Position = new float3() { 0, 0, 0 }, Scale = 1f });
4.  
5. Mesh tileMesh = job.CreateMesh();
6. tileMesh.RecalculateBounds();
7.  
8. EM.SetComponentData<RenderBounds>(tileEnt, new RenderBounds
9.                     {
10.                         Value = tileMesh.bounds.ToAABB()
11.                     });
12.  
13. RenderMeshArray rma = EM.GetSharedComponentManaged<RenderMeshArray>(tileEnt);
14.  
15. rma.Meshes = new Mesh[] { tileMesh };
16. rma.Materials = new Material[] { TerrainMaterial };
17.                    
18.  
19. RenderMeshDescription renderMeshDescription = new RenderMeshDescription() { FilterSettings = RenderFilterSettings.Default };
20. MaterialMeshInfo meshInfo = new MaterialMeshInfo()
21.                     {
22.                         Mesh = -1,
23.                         Material = -1
24.                     };
25.  
26. RenderMeshUtility.AddComponents(tileEnt, EM, renderMeshDescription, rma, meshInfo);
27.  
28.  

As explained at the top, the code above resutls in the two arrays on the RenderMeshArray component to be NULL like on the screenshot. The created meshes are valid, they are being rendered when assigned to a RenderMeshArray component that was created during the conversion. But as stated, I cannot reassign the array to fit all the meshes I need, because as soon as I reassign one of the two arrays of the component they will always be null.
Also: Adding the RenderMeshArray later on and not when creating the entity ( rma = new RenderMeshArray(){} ) does not solve the problem.

I feel like I am missing some part of the whole concept of entity rendering with the RenderMeshArray component here. If some could help me out here, I would appreciate

 

Try to add Rotation = quaternion.identity to

1. EM.AddComponentData<LocalTransform>(tileEnt, new LocalTransform { Position = new float3() { 0, 0, 0 }, Scale = 1f });

 

I have the same problem, but I am adding components using RenderMeshUtility.AddComponents

 

I got it. We need to use a consturctor, whan creating RenderMeshArray and not assigning array to properties directly